Main Entry: 1sum
Pronunciation: sm
Function: noun1: an indefinite or specified amount of money2: the whole amount <the sum of your experience>3 a: a summary of the chief points or thoughts b: the main point <the sum and substance of an argument>4 a: the result of adding numbers <the sum of 5 and 7 is 12> b: a problem in arithmetic - in sum: in short : BRIEFLY